Re: Mast mtg of preamp question

Allen Fugelseth WB6RWU wrote:
>
> I haven't mast mounted my preamps before and I was thinking about doing
> it this time. What is the practice? I was thinking about a short piece
> of coax to the preamp from the antenna located a couple feed away from
> the antenna feedpoint. Are they ever connected directly to the
> antenna at the feedpoint? I was also thinking of mounting a plastic box
> under the antennas and putting the preamps in there to keep them out of
> the weather.
If you want mast-head then fit them wherever practicable; mine are in a
box bolted to the top of the mast.
In my case (10-12m of cable) it is less necessary because theres not too
much feeder loss so next time I take the mast down I'll be removing them
and putting them in the shack. Why ? because I suffer *greatly* from the
cross-modulation they generate from local mobile/cellphone/pager/etc; my
QTH is an RFI hotspot. I have a good filter in the shack but it was *not*
mast-mountable (i.e. before the pre-amps). Worth thinking about if theres
a lot of RF sources locally.
73
Richard W L Limebear G3RWL
g3rwl@amsat.org
FOC # 1188
So many beautiful girls ..... (sob) so little time